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Isn't the usage similar to force_minrev? So microcode=debug should be enough, right? > + enable debugging mode when run in a guest > + > + base_rev=X - with with format: > + Set the base microcode revision of each thread when in > + debug mode. > + > force_minrev > Enable or disable the microcode minimal revision > enforcement for the runtime microcode loader. Slight preference for a tabbed description: debug enable debugging mode when run in a guest base_rev=X - with with format: Set the base microcode revision of each thread when in debug mode. force_minrev Enable or disable the microcode minimal revision enforcement for the runtime microcode loader. > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 58d890fe2100..462bf03aeda5 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -1360,6 +1360,18 @@ config MICROCODE_LATE_FORCE_MINREV > > If unsure say Y. > > +config MICROCODE_DBG > + bool "Enable microcode loader debugging" > + default n Isn't default n redundant? I am fine with keeping it to make it obvious. > + depends on MICROCODE Should we also include a dependency on DEBUG_KERNEL? > + help > + Enable code which allows for debugging the microcode loader in > + a guest. Meaning the patch loading is simulated but everything else > + related to patch parsing and handling is done as on baremetal with > + the purpose of debugging solely the software side of things. > + > + You almost certainly want to say n here. > +